CN113380171A - Color cast compensation method, display and vehicle-mounted display device - Google Patents
Color cast compensation method, display and vehicle-mounted display device Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/2003—Display of colours
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3607—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0613—The adjustment depending on the type of the information to be displayed
- G09G2320/062—Adjustment of illumination source parameters
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
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- G09G2320/06—Adjustment of display parameters
- G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature
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Abstract
The application discloses colour cast compensation method, display and on-vehicle display device, colour cast compensation method is applied to the display, and the display includes display panel, backlight unit, processing module and eye position detection module, and display panel includes N sub-display area, and colour cast compensation method includes: the eye position detection module detects eye position information; the processing module determines a first color cast value of the sub-display area viewed at the eye position corresponding to the eye position information; under the condition that the first color cast value is larger than a preset color cast threshold value, the processing module calculates a color deviation value between the first color cast value and a reference color cast value, wherein the reference color cast value is a color cast value when the sub-display area is viewed along a direction vertical to the display panel; and the processing module increases the brightness of the backlight source in the backlight module according to the color deviation value. By using the color cast compensation method provided by the application, the color cast of each sub-display area can be corrected, so that the watching effect of a user on the display is improved.
Description
Technical Field
The application belongs to the technical field of display, and particularly relates to a color cast compensation method, a display and a vehicle-mounted display device.
Background
With the development of display technology, the functions of electronic equipment are more and more, and higher use experience is brought to users. At the same time, users are increasingly demanding displays on electronic devices.
However, the current display still has some limitations, for example, as shown in fig. 1, when the user views the information displayed on the far end of the display, the color viewed by the user's eyes has a certain deviation from the color actually displayed on the far end, wherein the farther the user is away from the far end, the larger the deviation between the color viewed by the user's eyes and the color actually displayed on the user's eyes is. That is, there is a difference between the color seen by the user from the front-view direction (i.e., in a direction perpendicular to the display plane of the display) and the color seen from the side-view direction (i.e., in a direction not perpendicular to the display plane of the display), i.e., there is a color shift, which affects the viewing effect of the user on the display.
Disclosure of Invention
The embodiment of the application provides a color cast compensation method, a display and a vehicle-mounted display device, and can solve the technical problem that color cast occurs when a user watches the display.
In one aspect, an embodiment of the present application provides a color shift compensation method applied to a display, where the display includes a display panel, a backlight module, a processing module, and an eye position detection module, the display panel includes N sub-display regions, N is an integer greater than 1, the processing module is electrically connected to the eye position detection module and the backlight module, respectively, and the method includes:
the eye position detection module detects eye position information;
the processing module determines a first color cast value of the sub-display area viewed at the eye position corresponding to the eye position information;
in a case that the first color shift value is greater than a predetermined color shift threshold value, the processing module calculates a color shift value between the first color shift value and a reference color shift value, where the reference color shift value is a color shift value when the sub-display area is viewed in a direction perpendicular to the display panel;
and the processing module increases the brightness of a backlight source in the backlight module according to the color deviation value.
In another aspect, an embodiment of the present application provides a display, including:
the display panel comprises N sub-display areas, wherein N is an integer greater than 1;
the backlight module is arranged opposite to the display panel;
the eye detection module is used for detecting eye position information;
the processing module is respectively electrically connected with the eye detection module and the backlight module and is used for determining a first color cast value of the sub-display area viewed at the eye position corresponding to the eye position information; in a case that the first color shift value is greater than a predetermined color shift threshold value, the processing module calculates a color shift value between the first color shift value and a reference color shift value, where the reference color shift value is a color shift value when the sub-display area is viewed in a direction perpendicular to the display panel; and increasing the brightness of a backlight source in the backlight module according to the color deviation value.
In another aspect, an embodiment of the present application provides an on-vehicle display device, including: the display is described above.
According to the color cast compensation method, the display and the vehicle-mounted display device, when the user watches the display through eyes, the eye position detection module on the display can detect the eye position information, and then the processing module in the display determines the first color cast value of the sub-display area on the display panel watched through the eyes according to the eye position information. Under the condition that the first color cast value is larger than the preset color cast threshold value, which indicates that the color cast is larger when the eyes watch the information displayed in the sub-display area, the brightness of the corresponding backlight source in the backlight module is increased according to the first color cast value. Therefore, the brightness of the sub-display area is increased, and the color cast of the sub-display area is corrected, so that the viewing effect of a user on the display is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a display in the related art.
Fig. 2 is a schematic structural diagram of another display in the related art.
Fig. 3 is a schematic structural diagram of an embodiment of a display provided in the present application.
FIG. 4 is a schematic diagram illustrating one embodiment of a top view of a display as provided herein.
FIG. 5 is a schematic diagram of another embodiment of a top view of a display as provided herein.
FIG. 6 is a schematic diagram of yet another embodiment of a top view of a display provided herein.
Fig. 7 is a schematic flowchart of an embodiment of a color shift compensation method provided in the present application.
Fig. 8 is a schematic flowchart of another embodiment of a color shift compensation method provided in the present application.
Fig. 9 is a schematic diagram of an embodiment of a color shift compensation method provided in the present application.
Fig. 10 is a schematic diagram of another embodiment of a color shift compensation method provided in the present application.
Fig. 11 is a schematic diagram of a color shift compensation method according to another embodiment of the present application.
Fig. 12 is a schematic flowchart of a color shift compensation method according to another embodiment of the present disclosure.
Fig. 13 is a schematic diagram of a color shift compensation method according to still another embodiment of the present application.
Detailed Description
Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are intended to be illustrative only and are not intended to be limiting. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Large-sized displays (such as vehicle-mounted displays, displays on televisions, displays for video conferences, etc.) are relatively prone to color shift, and the color shift is illustrated by the near-end viewing angle and the far-end viewing angle by taking a Thin Film Transistor Liquid Crystal Display (TFT-LCD) as an example.
As shown in fig. 2, the display includes a display panel 102 and a backlight module 104, wherein the backlight module 104 includes a first glass substrate 1022, a second glass substrate 1024, and a liquid crystal cell disposed between the first glass substrate 1022 and the second glass substrate 1024, and the liquid crystal cell has liquid crystal molecules 1026 therein. The liquid crystal molecules 1026 are parallel to the displayWhen the user looks at the display obliquely with the eyes, the emergent light and the liquid crystal molecules 1026 form different angles, i.e. Δ n1 and Δ n2, under different states of the near-end viewing angle and the far-end viewing angle, and the optical path d of the sight line passing through the liquid crystal box is different1And d2Also, as can be seen from the following formula (1) for calculating the wavelength transmittance T, the wavelength transmittance T is different at different viewing angles, thereby generating a color shift phenomenon, which affects the viewing effect of the user on the display.
Wherein θ represents the liquid crystal molecule azimuth angle; at the proximal view angle, Δ n ═ Δ n1, d ═ d1In the distal view, Δ n ═ Δ n2, and d ═ d2And λ represents a wavelength.
In order to solve the technical problem that color cast occurs when a user watches a display, the embodiment of the application provides a color cast compensation method, and the color cast compensation method is applied to the display. As shown in fig. 3, the display includes a display panel 102, a backlight module 104, a processing module 106 and an eye position detecting module 108, wherein the processing module 106 is electrically connected to the eye position detecting module 108 and the backlight module 104, respectively. Specifically, the processing module 106 is electrically connected to the backlight module 104 through the backlight driving module 110. The backlight module 104 may be a field sequential backlight module.
As shown in fig. 4, the display panel 102 includes N sub-display regions, where N is an integer greater than 1. As one example, the display panel 102 may be equally divided into N sub-display regions.
Of course, the N sub-display regions may not be equally divided, and are not limited herein. For example, as shown in fig. 5, the lengths of the sub display regions gradually increase in the X-axis direction from the first sub display region to the nth sub display region. For another example, as shown in fig. 6, the lengths of the sub-display regions in the X-axis direction gradually decrease from the first sub-display region to the nth sub-display region. As an example, the display panel 102 may be divided into N sub-display regions by the pixels on the display panel 102, such that each sub-display region is a display region formed by at least one column of pixels of the display panel 102. In one particular example, each sub-display area has the same number of columns of pixels.
The color shift compensation method provided by the present application is described below with reference to fig. 3 and 4.
In the case where the user views the display, the eye position information of the user is detected by the eye position detection module 108. Then, the processing module 106 obtains the eye position information detected by the eye position detecting module 108, and determines the first color cast value when the user's eyes view each sub-display region according to the eye position information. When the first color shift value of the user's eyes viewing a certain sub-display area is greater than the preset color shift threshold value, which indicates that the color shift of the eyes viewing the information displayed in the sub-display area is large, the brightness of the backlight source corresponding to the sub-display area in the backlight module 104 is increased. Therefore, the brightness of the sub-display area is increased, so that the color cast of the sub-display area is corrected, and the viewing effect of a user on the display is improved.
Fig. 7 is a schematic flowchart of an embodiment of a color shift compensation method provided in the present application. As shown in fig. 7, the color shift compensation method includes:
s202, the eye position detecting module 108 detects the eye position information.
As one example, the eye position detection module 108 may include a camera through which an eye image including eye position information is captured. As another example, the eye position detection module 108 may further include a distance sensor (such as an infrared sensor) by which eye position information is detected.
The color shift compensation method further comprises:
s204, the processing module 106 determines a first color cast value of the sub-display area viewed at the eye position corresponding to the eye position information;
in step S206, if the first color shift value is greater than the predetermined color shift threshold (e.g., the predetermined color shift threshold is 0.02), the processing module 106 calculates a color shift value between the first color shift value and a reference color shift value, where the reference color shift value is a color shift value when the sub-display region is viewed along a direction perpendicular to the display panel 102.
In S206, the processing module 106 may calculate a difference between the first color shift value and the reference color shift value, which is a color shift value. Wherein the color deviation value un＝ΔUn-ΔU0Wherein, Δ UnA first color shift value, Δ U, representing viewing of the nth sub-display region at the eye position0Represents a reference color shift value, N ∈ [1, N ∈]And n is an integer. The reference color shift value may be a preset value.
The color shift compensation method further comprises:
s208, the processing module 106 increases the brightness of the backlight source corresponding to the sub-display area in the backlight module 104 according to the color deviation value.
In this embodiment, when the user's eyes watch the display, the eye position detecting module 108 on the display detects the eye position information, and then the processing module 106 on the display determines the first color cast value of the sub-display area on the display panel 102 watched by the eyes according to the eye position information. When the first color shift value is greater than the predetermined color shift threshold value, which indicates that the color shift is large when the eye views the information displayed in the sub-display region, the brightness of the backlight source corresponding to the sub-display region in the backlight module 104 is increased according to the first color shift value. Therefore, the brightness of the sub-display area is increased, and the color cast of the sub-display area is corrected, so that the viewing effect of a user on the display is improved.
The sub-display area may be any one of the sub-display areas on the display panel 102. The sub-display region may be a position where the eye is gazed at, or may be a position where the eye is not gazed at. If the sub-display area is not watched by the eyes, the color cast of the sub-display area can be adjusted in time when the eyes do not watch the sub-display area, so that the effect of watching the sub-display area by the eyes is better and the color cast is avoided when the eyes watch the sub-display area.
In one or more embodiments of the present application, as shown in fig. 8, S204 may include:
s2042, the processing module 106 determines, according to the eye position information, a line-of-sight angle formed by the line of sight viewing the sub-display area at the eye position and the display panel 102;
s2044, the processing module 106 obtains a first color shift value corresponding to the viewing angle according to the corresponding relationship between the preset angle and the color shift value.
Specifically, referring to fig. 9, the processing module 106 determines a viewing angle α formed by the viewing line for viewing the nth sub-display region at the eye position and the display panel 102 according to the eye position informationn. As an example, the angle of sight αnMay be a line-of-sight angle formed by a line of sight viewing the center position of the nth sub-display region at the eye position and the display panel 102.
Fig. 9 shows a view angle α formed by the display panel 102 and a view line of the nth sub-display region viewed at the eye positionNThat is, fig. 9 shows the case where N is N.
At the angle of sight alphanThen, the processing module 106 may obtain the viewing angle α according to the corresponding relationship between the preset angle and the color shift valuenCorresponding first color deviation value delta Un。
As an example, the correspondence between the angle and the color shift value may be a functional relationship as follows:
ΔUn＝f(αn) (2)
the formula (1) may be a function obtained by analyzing the relationship between the angle and the color cast value by the operator.
As another example, the correspondence between angles and color shift values may be a one-to-one correspondence between a plurality of angles and color shift values. For example, according to empirical data, the correspondence between the angle and the color shift value is set in advance.
In the embodiment of the present application, the processing module 106 first determines a viewing angle formed by a viewing line viewing the sub-display area at the eye position and the display panel 102, and then obtains a first color cast value corresponding to the viewing angle. Thus, the processing module 106 can obtain the first color shift value by processing the eye position information to correct the color shift, without adjusting the structure of the display.
In one or more embodiments of the present application, the eye position information may include a first distance that the eye position is perpendicular to the display panel 102. For example, the first distance may be a in fig. 9.
The processing module 106 determines, according to the eye position information, a viewing angle formed by a viewing line viewing the sub-display area at the position and the display panel 102, which may specifically include:
the processing module 106 acquires the target length of the orthographic projection of the line of sight of the sub-display area from the eye position on the display panel 102;
the processing module 106 calculates the first distance and the target length by using an arctangent function to obtain the viewing angle.
For example, with continued reference to fig. 9, the processing module 106 obtains the target length l of the orthographic projection of the line of sight viewing the sub-display area from the eye position on the display panel 102, and then calculates the first distance and the target length by using the arctangent function to obtain the line of sight angle α shown in formula (3)n：
In fig. 9, N is an example of the viewing angle α in fig. 9nIn the same way, N is obtained as [1, N ]]Angle of sight alpha when any one of the integers is includedn。
In one or more embodiments of the present application, the N sub-display regions are sequentially arranged in the first direction of the display panel 102 from a first predetermined position of the display panel 102, the eye position information may further include indication information, and the indication information indicates that an orthographic projection of the eye position on the display panel 102 is located at the first predetermined position. For example, with continued reference to fig. 9, the N sub-display regions are sequentially arranged in the X-axis direction of the display panel 102 from the first predetermined position a of the display panel 102, and the eye position detection module 108 detects that the orthographic projection of the eyes on the display panel 102 is located at the first predetermined position a.
The processing module 106 obtains a target length of an orthographic projection of a line of sight viewing the sub-display region from the eye position on the display panel 102, and may include:
for the nth sub-display region, the processing module 106 calculates the widths of the first N sub-display regions in the first direction, respectively, to obtain the target length of the orthographic projection of the line of sight viewing the nth sub-display region from the eye position on the display panel 102, where N is an integer and N is [1, N ].
For example, with continued reference to FIG. 9, since the N sub-display regions on the display panel 102 are obtained by equally dividing the display panel 102 into N in the X-axis direction, the width of each sub-display region in the first direction is the same
For the nth sub-display region, the forward projection target length of the line of sight viewing the center position of the nth sub-display region from the eye position on the display panel 102
Then, the angle of sight αnThe following formula (4) may be used:
where L denotes the length of the display panel 102 in the X-axis direction, and N denotes the number of sub-display areas on the display panel 102.
Fig. 9 illustrates the angle α of view using N as an examplenAs can be seen from fig. 9, the orthographic projection target length of the line of sight of the nth sub-display region viewed from the eye position on the display panel 102
Then the angle of sight alphaNThe following equation (5) may be used:
it should be noted that the N sub-display regions in the embodiment of the present application are sub-display regions obtained by equally dividing the display panel 102 into N parts. Next, a case where the N sub-display regions are not the sub-display regions obtained by the average division will be described.
For example, the N sub-display regions are sub-display regions shown in fig. 5, and the length of each sub-display region in the X-axis direction is determined. Based on this, the target length l of the orthographic projection of the line of sight viewing the center position of the sub-display region from the eye position on the display panel 102, specifically, the target length l of the orthographic projection of the line of sight viewing the center position of the nth sub-display region from the eye position on the display panel 102 can be calculated as X1+X2+X3+……+X(n-1)+Xn/2 wherein XiRepresents the length of the ith sub-display region in the X-axis direction, i ∈ [1, n ∈ ]]。
After calculating the target length l, the target length l may be substituted into the above formula (3) to obtain the corresponding sight angle αn。
In one or more embodiments of the present application, the eye position information includes a first distance that the eye position is perpendicular to the display panel 102, and a second distance from the eye position to a second predetermined position within the sub-display region. For example, as shown in fig. 10, a first distance from the eye position to the display panel 102 is a, and a second distance from the eye position to a center position in the nth (N ═ N in the example of fig. 10) sub-display region is b.
How the second distance b is detected is explained below by way of an example.
The eye position detecting module 108 may include a distance sensor disposed at a center position of each sub-display region, and then the second distance b may be detected by the distance sensor disposed at a center position of the nth sub-display region.
After detecting the second distance b, the gaze angle may be found. The determining, by the processing module 106, a viewing angle formed by a viewing line for viewing the sub-display area at the eye position and the display panel 102 according to the eye position information may include:
the processing module 106 calculates the first distance and the second distance by using an arcsine function to obtain the sight angle.
With continued reference to fig. 10, a second distance from the eye position to the center position of the nth (N ═ N in the example of fig. 10) sub-display region is b, then the line-of-sight angle α isnThe following equation (6) may be used:
in the embodiment of the present application, the viewing angle of the eye is obtained by using an arcsine function, where it is not limited that the orthographic projection of the eye on the display panel 102 is located at the first predetermined position a, and the orthographic projection of the eye on the display panel 102 may be located at other positions.
For example, referring to fig. 11, the eye position detection module 108 can detect that the first distance a of the eye perpendicular to the display panel 102 is a. In addition, since the distance sensor is provided at the center position of each sub-display region, for the nth (N ═ N in the example of fig. 11) sub-display region, the second distance from the eye position to the center position within the nth sub-display region can be detected as b by the distance sensor provided at the nth sub-display region. Then, the first distance a and the second distance b are substituted into the above equation (6), and the viewing angle α can be obtainedn。
In one or more embodiments of the present disclosure, the backlight module 104 includes N backlight source groups, and the N backlight source groups correspond to the N sub-display regions one to one. Each backlight source group is used for providing backlight for the corresponding sub-display area.
As shown in fig. 12, S208 may include:
s208', the processing module 106 increases the brightness of the backlight source set corresponding to the sub-display region according to the color deviation value.
For example, in order to correct the color shift of the nth sub-display region, the luminance of the backlight light source group corresponding to the nth sub-display region is increased to correct the color shift of the nth sub-display region. In this way, when the user views the content displayed in the nth sub-display region, the effect of the user viewing the nth sub-display region is ensured.
In one or more embodiments of the present application, the increasing, by the processing module 106, the brightness of the backlight light source group corresponding to the sub-display area according to the color deviation value may include:
the processing module 106 obtains a target brightness adjustment amplitude corresponding to the color deviation value according to a corresponding relationship between a preset difference value and the brightness adjustment amplitude;
the processing module 106 increases the brightness of the sub-display region corresponding to the backlight light source group according to the target brightness adjustment range, and the brightness increase range corresponding to the backlight light source group is the target brightness adjustment range.
The processing module 106 increases the brightness of the backlight light source group corresponding to the sub-display region according to the target brightness adjustment amplitude, and may include:
the processing module 106 increases the brightness of the corresponding backlight light source group by increasing the voltage of the backlight light source group corresponding to the sub-display region according to the target brightness adjustment amplitude, wherein the voltage increase amplitude of the corresponding backlight light source group corresponds to the target brightness adjustment amplitude.
The target brightness adjusting amplitude comprises target brightness adjusting amplitudes respectively corresponding to three primary colors (specifically red, green and blue), and the backlight light source group corresponding to the sub-display area comprises three primary color light sources;
the adjusting of the amplitude by the processing module 106 according to the target brightness to increase the brightness of the backlight light source group corresponding to the sub-display region may include:
for each primary color light source in the three primary color light sources, the processing module 106 increases the brightness of the primary color light source in the backlight light source group corresponding to the sub-display region according to the target brightness adjustment amplitude corresponding to the primary color light source.
As an example, each of the three primary Light sources may be a Light-Emitting Diode (LED), such as a red-green-blue mini LED (rgb mini LED).
The following is an exemplary description of embodiments of the present application.
In calculating unThen, the processing module 106 obtains a target brightness adjustment amplitude corresponding to the color deviation value according to the corresponding relationship between the difference value and the brightness adjustment amplitude shown in formula (7), where the target brightness adjustment amplitude includes the brightness adjustment amplitudes of the light sources of the three primary colors of red, green, and blue.
un＝f(ΔYRn,ΔYGn,ΔYBn) (7)
Wherein, Delta YRnIndicating the brightness adjustment range of the red light source in the backlight light source group corresponding to the nth sub-display region, Δ YGnIndicating the brightness adjustment range of the green light source in the backlight light source group corresponding to the nth sub-display region, Δ YBnIndicating that the nth sub-display region corresponds to the brightness adjustment amplitude of the blue light source in the backlight light source group.
After the brightness adjustment amplitudes of the light sources of the three primary colors of red, green and blue are obtained, the voltage adjustment amplitude of each primary color light source is obtained according to the corresponding relationship between the brightness adjustment amplitudes and the voltages of the primary color light sources as shown in formula (8).
ΔY＝f(ΔV) (8)
Where Δ Y represents the brightness adjustment amplitude of the primary light source, and Δ V represents the voltage adjustment amplitude of the primary light source. When Δ Y is equal to Δ YRnUnder the condition, the voltage regulation amplitude of the red light source in the backlight light source group corresponding to the nth sub-display region can be calculated through the formula (8); when Δ Y is equal to Δ YGnUnder the condition, the voltage regulation amplitude of the green light source in the backlight light source group corresponding to the nth sub-display area can be calculated through the formula (8); when Δ Y is equal to Δ YBnIn this case, the voltage adjustment amplitude of the blue light source in the backlight light source group corresponding to the nth sub-display region can be calculated by formula (8).
After the light source voltage regulating amplitudes of the three primary colors of red, green and blue are obtained, regulating amplitude delta V according to the red light source voltageRnIncrease and increaseThe large nth sub-display region corresponds to the voltage of the red light source in the backlight light source group, so that the brightness of the red light source is increased. Similarly, amplitude Δ V is adjusted according to green light source voltageGnIncreasing the voltage of the green light source in the backlight light source group corresponding to the nth sub-display area; adjusting amplitude Δ V according to blue light source voltageBnAnd increasing the voltage of the blue light source in the nth sub-display area corresponding to the backlight light source group.
Therefore, the brightness of each primary color light source in the backlight light source group corresponding to the sub-display area is increased, so that the color cast of the sub-display area is corrected.
Based on the color cast compensation method, an embodiment of the present application further provides a display, where the display specifically includes:
a display panel 102 including N sub-display regions, N being an integer greater than 1;
a backlight module 104 disposed opposite to the display panel 102;
the eye detection module is used for detecting eye position information;
a processing module 106, electrically connected to the eye detection module and the backlight module 104, for determining a first color deviation value of the sub-display area viewed at the eye position corresponding to the eye position information; in the case that the first color shift value is greater than the predetermined color shift threshold, the processing module 106 calculates a color shift value between the first color shift value and a reference color shift value, where the reference color shift value is a color shift value when the sub-display area is viewed along a direction perpendicular to the display panel 102; according to the color deviation value, the brightness of the backlight source corresponding to the sub-display area in the backlight module 104 is increased.
The backlight module 104 may be a field sequential display backlight module. The Processing module 106 may include an Integrated Circuit (IC), a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or may be configured to implement one or more Integrated circuits of the embodiments of the present Application.
Since the display provided in the embodiment of the present application can implement the color shift compensation method in any one of the embodiments described above, the embodiment of the present application has the same technical effect as the color shift compensation method in any one of the embodiments described above, and details are not repeated here.
The embodiment of the application also provides an on-vehicle display device, which comprises the display provided by the embodiment. In an actual application scene, when a driver uses the vehicle-mounted display device in a vehicle, the eye position detection module on the vehicle-mounted display device detects the eye position information of the driver, and then the processing module on the vehicle-mounted display device determines the first color cast value of the driver watching the sub-display area on the vehicle-mounted display device according to the eye position information. And when the first color cast value is larger than the preset color cast threshold value, which indicates that a relatively large color cast occurs when the driver watches the information displayed in the sub-display area, the brightness of the sub-display area is increased, so that the color cast of the sub-display area is corrected. Therefore, the effect of the driver watching the information displayed in the sub-display area is the same as or basically similar to the display effect of the driver watching the sub-display area in a front view, and the watching effect of the driver is ensured.
In one example, a vehicle-mounted display device may be installed in the vehicle, and if the eye position detecting module on the vehicle-mounted display device detects eye position information of a plurality of users, for example, an eye position information portion of a driver and eye position information of a person in a passenger seat, the processing module further needs to select an eye position information portion of the driver from the eye position information of the plurality of users. Specifically, it is possible to acquire eye position information within a preset driver position range among eye position information of a plurality of users, and perform color shift correction based on the eye position information. In this way, the priority of the driver using the in-vehicle display device is made higher than the priority of other persons using the in-vehicle display device.
In one example, multiple in-vehicle display devices may be installed in a vehicle, such as two in-vehicle display devices, one for the driver and one for the passenger in the front passenger seat. The display on the in-vehicle display device for the driver may be the display shown in fig. 9, and the display on the in-vehicle display device for the person in the front passenger seat may be the display shown in fig. 13. As can be seen by comparing fig. 9 and 13, the arrangement direction of the first to nth sub-display regions in fig. 9 is opposite to the arrangement direction of the first to nth sub-display regions in fig. 13. The first predetermined positions a in fig. 9 are located on the side of the display opposite to the X axis, and the first predetermined positions a in fig. 13 are located on the side of the display in the positive X axis.
The vehicle-mounted display device provided by the embodiment of the application has the same technical effects as the display provided by the embodiment, and repeated description is omitted here.
It is to be understood that the present application is not limited to the particular arrangements and instrumentality described above and shown in the attached drawings. A detailed description of known methods is omitted herein for the sake of brevity. In the above embodiments, several specific steps are described and shown as examples. However, the method processes of the present application are not limited to the specific steps described and illustrated, and those skilled in the art can make various changes, modifications, and additions or change the order between the steps after comprehending the spirit of the present application.
It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, the present application is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, may be performed in an order different from the order in the embodiments, or may be performed simultaneously.
Aspects of the present disclosure are described above with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, enable the implementation of the functions/acts specified in the flowchart and/or block diagram block or blocks. Such a processor may be, but is not limited to, a general purpose processor, a special purpose processor, an application specific processor, or a field programmable logic circuit. It will also be understood that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware for performing the specified functions or acts, or combinations of special purpose hardware and computer instructions.
As described above, only the specific embodiments of the present application are provided, and it can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the system, the module and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. It should be understood that the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present application, and these modifications or substitutions should be covered within the scope of the present application.
Claims (12)
1. A color cast compensation method is applied to a display, and is characterized in that the display comprises a display panel, a backlight module, a processing module and an eye position detection module, the display panel comprises N sub-display areas, N is an integer greater than 1, the processing module is respectively electrically connected with the eye position detection module and the backlight module, and the method comprises the following steps:
the eye position detection module detects eye position information;
the processing module determines a first color cast value of the sub-display area viewed at the eye position corresponding to the eye position information;
in a case that the first color shift value is greater than a predetermined color shift threshold value, the processing module calculates a color shift value between the first color shift value and a reference color shift value, where the reference color shift value is a color shift value when the sub-display area is viewed in a direction perpendicular to the display panel;
and the processing module increases the brightness of a backlight source in the backlight module according to the color deviation value.
2. The method of claim 1, wherein the determining, by the processing module, a first color shift value of the sub-display area viewed at an eye position corresponding to the eye position information comprises:
the processing module determines a sight angle formed by a sight line for watching the sub-display area at the eye position and the display panel according to the eye position information;
the processing module acquires the first color cast value corresponding to the sight angle according to the corresponding relation between the preset angle and the color cast value.
3. The method of claim 2, wherein the eye position information comprises a first distance that the eye position is perpendicular to the display panel;
the processing module determines a sight angle formed by a sight line for watching the sub-display area at the position and the display panel according to the eye position information, and the sight angle comprises:
the processing module acquires the orthographic projection target length of a sight line of the sub-display area from the eye position on the display panel;
and the processing module calculates the first distance and the target length by using an arctangent function to obtain the sight angle.
4. The method according to claim 3, wherein the N sub-display regions are sequentially arranged in the first direction of the display panel from a first predetermined position of the display panel, the eye position information further includes indication information, and the indication information indicates that a forward projection of the eye position on the display panel is located at the first predetermined position,
the processing module acquires a target length of an orthographic projection of a line of sight of the sub-display region viewed from the eye position on the display panel, and the target length includes:
for the nth sub-display area, the processing module calculates the widths of the first N sub-display areas in the first direction respectively to obtain the target length of the orthographic projection of the line of sight of the nth sub-display area viewed from the eye position on the display panel, where N belongs to [1, N ], and N is an integer.
5. The method of claim 4, wherein the sub-display area is a display area formed by at least one column of pixels of the display panel.
6. The method of claim 2, wherein the eye position information comprises a first distance that the eye position is perpendicular to the display panel and a second distance from the eye position to a second predetermined location within the sub-display region,
the processing module determines a viewing angle formed by a viewing line of the sub-display area at the eye position and the display panel according to the eye position information, and the determining includes:
and the processing module calculates the first distance and the second distance by using an arcsine function to obtain the sight angle.
7. The method according to any one of claims 1 to 6, wherein the backlight module comprises N backlight source groups, and the N backlight source groups correspond to the N sub-display regions one to one;
the processing module increases the brightness of the backlight source in the backlight module according to the color deviation value, and the processing module comprises:
and the processing module increases the brightness of the backlight light source group corresponding to the sub-display area according to the color deviation value.
8. The method as claimed in claim 7, wherein the step of increasing the brightness of the backlight source set corresponding to the sub-display area according to the color deviation value by the processing module comprises:
the processing module acquires a target brightness adjustment amplitude corresponding to the color deviation value according to a corresponding relation between a preset difference value and the brightness adjustment amplitude;
and the processing module increases the brightness of the sub-display area corresponding to the backlight light source group according to the target brightness adjustment amplitude, and the brightness increase amplitude corresponding to the backlight light source group is the target brightness adjustment amplitude.
9. The method according to claim 8, wherein the processing module increases the brightness of the backlight source set corresponding to the sub-display region according to the target brightness adjustment amplitude, and comprises:
and the processing module increases the brightness of the corresponding backlight light source group by increasing the voltage of the backlight light source group corresponding to the sub-display area according to the target brightness adjustment amplitude, wherein the voltage increase amplitude of the corresponding backlight light source group corresponds to the target brightness adjustment amplitude.
10. The method according to claim 8, wherein the target brightness adjustment range comprises target brightness adjustment ranges respectively corresponding to three primary colors, and the sub-display area corresponding backlight light source group comprises three primary color light sources;
the processing module increases the brightness of the backlight light source group corresponding to the sub-display area according to the target brightness adjusting amplitude, and the method comprises the following steps:
for each primary color light source in the three primary color light sources, the processing module increases the brightness of the primary color light source in the backlight light source group corresponding to the sub-display area according to the target brightness adjustment amplitude corresponding to the primary color light source.
11. A display, comprising:
the display panel comprises N sub-display areas, wherein N is an integer greater than 1;
the backlight module is arranged opposite to the display panel;
the eye detection module is used for detecting eye position information;
the processing module is respectively electrically connected with the eye detection module and the backlight module and is used for determining a first color cast value of the sub-display area viewed at the eye position corresponding to the eye position information; in a case that the first color shift value is greater than a predetermined color shift threshold value, the processing module calculates a color shift value between the first color shift value and a reference color shift value, where the reference color shift value is a color shift value when the sub-display area is viewed in a direction perpendicular to the display panel; and increasing the brightness of a backlight source in the backlight module according to the color deviation value.
12. An in-vehicle display device characterized by comprising: a display as claimed in claim 11.
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